The primary outcome measure will be the Neuropsychiatric Inventory, a standardised questionnaire used to assess the psychopathology of dementia patients. This will be carried out with residents' keyworkers at the following time points: as a baseline measure in the 2 weeks prior to the commencement of the music therapy intervention period, then at weeks 11-12, weeks 21-22 and as a follow-up at weeks 27-28. There will be three secondary outcome measures: